King's Scepter Gentian
Gentiana sceptrum
Last reviewed: August 2026
King's Scepter Gentian is a deep blue-flowered forb that blooms from July through September in wet meadows, bogs, and streambanks. It grows best in part sun with medium to consistently moist soil.
Toxicity unknown
King's Scepter Gentian (Gentiana sceptrum) is not listed by the ASPCA Animal Poison Control Center (opens in new tab) or the other sources we check, so we have no verdict for it either way. Absence from those lists is not a clearance. If your pet shows symptoms after eating any plant, call the ASPCA at (888) 426-4435.
Light
part sun
Water
medium
Size
4"–16" H × 3"–8" W
Bloom
Jul, Aug, Sep
Native to
CA, OR, WA
Pollinators
bees
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King's scepter gentian is a compact perennial wildflower that forms neat clumps of green foliage topped with vibrant blue-purple tubular flowers from July through September. This native plant grows 4-16 inches tall and prefers partial sun with consistent moisture.
Growing King's Scepter Gentian
Grow King's Scepter Gentian in part sun and medium water. Mature plants reach 4 to 16 inches tall and spread 3 to 8 inches wide. Expect moderate maintenance to keep it looking intentional in a front yard.
In an HOA neighborhood
King's Scepter Gentian takes more care to keep looking intentional in a front yard. Maintenance level: moderate. Consider it for backyard or mid-zone beds rather than the street edge.
Works well in: backyard only.
- Looks like a wildflower rather than ornamental plant
- Unknown winter appearance may be messy
- Small size may appear sparse in formal plantings
Wildlife value
The tubular flowers are particularly attractive to bees during the late summer blooming period. This native gentian provides important nectar when many other flowers are finishing for the season.
Common questions
- When does King's Scepter Gentian bloom?
- Gentiana sceptrum typically flowers from July through September, producing tall stalks of deep blue, trumpet-shaped blossoms.
- What pollinators visit Gentiana sceptrum?
- Bees are the main pollinators, visiting the tubular flowers for nectar during the late summer bloom period.
- What growing conditions does this plant need?
- It does best in part sun with medium to wet soil, matching the moist meadows, bogs, and streambank edges where it naturally grows.
- Does King's Scepter Gentian keep its leaves year round?
- No. It is a herbaceous perennial forb that dies back to the ground each year rather than holding foliage through winter.
- Is King's Scepter Gentian HOA-friendly?
- King's Scepter Gentian takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.
These answers were drafted with an AI model from this plant's data. Verify care details with a local expert.
Native range data from vouchered herbarium specimen records and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.
If something looks wrong
Common plant problems, and what to check first
These come up on almost any plant. Each guide lists the likely causes in the order they are worth ruling out, with one thing to check before you act on any of them, and links to the source it came from.
- It is dying right after planting
- Leaves turning yellow
- Wilting even though I watered it
- Brown crispy leaf tips
- Bugs on the plant
Ready to grow King's Scepter Gentian? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.
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